Because a sample is information obtained from the population that will be used in hypothesis testing.
WER 1.19.2011
Samples are used to save time and money when the population is large and when the units must be destroyed to gain information.
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sampl statistics
When the sample - whether it is random or systematic - is somehow representative of the population.
statistics
Inferential statistics
There are a few reasons why samples are used in statistics. One reason is that the whole population cannot be used and a sample is a good representation of the whole.
sampl statistics
Inferential statistics.
Greek letters are used for population parameters. Eg: µ is the population mean English letters are used for sample statistics. Eg: x-bar is the sample mean
A representative sample is one where the statistics of the sample are the same as the statistics for the parent population.
sample.
When the sample - whether it is random or systematic - is somehow representative of the population.
Will a sample descriptive statistics accurately estimate the underlying population's parameters?
statistics
Inferential statistics
Statistics
There are a few reasons why samples are used in statistics. One reason is that the whole population cannot be used and a sample is a good representation of the whole.
Sample Statistics